Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 25 insertions, 0 deletions

diff --git a/Documentation/media/uapi/dvb/dvb-fe-read-status.rst b/Documentation/media/uapi/dvb/dvb-fe-read-status.rst
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+.. -*- coding: utf-8; mode: rst -*-
+
+.. _dvb-fe-read-status:
+
+***************************************
+Querying frontend status and statistics
+***************************************
+
+Once :ref:`FE_SET_PROPERTY <FE_GET_PROPERTY>` is called, the
+frontend will run a kernel thread that will periodically check for the
+tuner lock status and provide statistics about the quality of the
+signal.
+
+The information about the frontend tuner locking status can be queried
+using :ref:`FE_READ_STATUS`.
+
+Signal statistics are provided via
+:ref:`FE_GET_PROPERTY`.
+
+.. note::
+
+   Most statistics require the demodulator to be fully locked
+   (e. g. with :c:type:`FE_HAS_LOCK <fe_status>` bit set). See
+   :ref:`Frontend statistics indicators <frontend-stat-properties>` for
+   more details.